OS Memory Management
The most important resource is memory, that must be carefully managed.
Basically every programmer or even normal computer programmer or user wants infinitely large and fast memory. And the memory is also non-volatile memory, means a memory that doesn't lose its content when the power supply stops.
Memory manager manages the memory hierarchy in OS. The work of memory manager is to keep track that which part of the memory are in use and which part of the memory are not in use just to allocate the memory to processes whenever they need and when their works are done, then deallocate that part of memory.
There is another work of memory manager which is to manage the swapping between main memory and disk when main memory is too small to hold all the processes.
Memory management systems basically divided into the following two classes:
- One that move process back and forth between main memory and disk during the execution
- And second that doesn't
Now-a-day, efficient memory management must be performed because softwares are growing even faster than memory.
You will learn all about memory management in detail, divided into the following tutorials:
- Memory Management
- Relocation and Protection
- Memory Management with Bitmaps
- Memory Management with Linked Lists
- Virtual Memory
- Page Replacement Algorithms
- Local vs Global Allocation Policies
- Load Control
- Page Size
- Separate Instruction & Data Space
- Shared Pages
- Cleaning Policies
- Virtual Memory Interface
- Implementation Issues
- OS Involvement with Paging
- Page Fault Handling
- Instruction Backup
- Locking Pages in Memory
- Backing Store
- Separation of Policy & Mechanism
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